Investigation of optimal range of gestational weight gain for twin pregnancies according to Chinese specific body mass index categories.

BMC Pregnancy Childbirth · 2026 · PMC13281350 · PMID 42067789

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an increasing trendno p-value reported

This, in turn, has resulted in decreased fertility in older adult women and an increased reliance for assisted reproductive technology (ART), jointly leading to an increasing trend of twinning rates in China from 2012 onwards [ 2 ].

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